Carbureter.



J. BRUTIGAM.

GARBURETER. APPLICATION FILED JULY 5, 1912.

1,072,565, Patented sept.9,1913. I

te closed by c bottom vInvinnfn 'STATES I PATENT OFFICE.

JOSEF-:BR-UBIIGAM, on nnrnol'r, MIGHIGAN, AsSroNon, BY' MEsNE ASSIGNMENTS, 0F (mili-HALE T0 FRANK A. ROLE, 0F DETROIT) MICHIGAN.

cnnnunnmn'n..

new .und usefu 'Improvements in, Cao-bnf.

reters, of which the' following is. o specifico.- tion., reference being had therein tothe ato.- compunyinqcn` drawings.

This invention relates to improvenlerltsln onrburcters especially -odopted for use iu supplying,` explosive charges tointerno'l combastion engines and its object` is to provide e. simple construction winch .is such thet e propernnxture of fuel und an' will be prof vided nt very low cnginespeed and which is so arranged that the lnlxture of mr and `fuel will he properly proportioned for till increased speeds und further-to. Provide certain other new and useful features in the construction ond. arrangement of ports To these ends. the invention consists in the matters yhcreinutten: set forth and n'lore pertieulnrly pointed out in, the claims reference being had tothe accompanying drawings 1n whch- I Figure l is u central vertical section through n device embodying the invention; Fig', 2 a transverse section thereof showing eletotion; and Fifa;- 3 is n transverse section substantially on the line 3 3' of Fig- 2.

In the drawing 1.-1.'ep.resents e suitoblc lient chamber into' which fuel is admitted by means of a valve 2 operated by o suitable lient 3 toinnintnin o certain level of gosolene in the chamber. The construction und o1'- l'ongoxncnt of the floot and. valve for con 1is turned. in any suitable Henner os. by moons` of n lever 8 secured?,upon4 the outer end of the pin. The lower end or the casing 4 is the oir dome within the. mixing chamber n Snectnoetion o'ffnetters testent vnineteen ined .puy s, 191e serial, No. 707,131,

Patented Sept. 9, 1913.

opening 104 for the admission of air into the chamber. This bottom closure 9 is formed with zi passage y1 1, extending longitudinolly of o bridgev bor l2 which entends ecross the. opening lO and this. passage is open at one cnd' into the. ti'oet choinber ond nt its opposite end coinrnnnicotcswith c. vertical passage 13 formed in the longitudinal axis of u nozzle member llt which is screwed into :in opening in the bridge bnr l2 and extends vertically upward therefrom in the axis of the casing. A4t. A i ably secured to the bottom 9 which is' prefl erubly formed integral with the float chomber, by means of screws or bolts 15 pztssing through openings in aange on the casing.' Secured yaxially Within the lower end of the casing fl. is an oir-dome 16 having a flange 1T `et its lower end fitting Within the -lower end' of the casing` onli secured to the bottom 9 by Ineens of screws or bolts 18. This air dome is provided with sin axial opening 19 in its top and the upper end of the dome is contracted slightly toward said opening into which the discharge end.v of the nozzle 14 projects. The dome 16 is formed with u plurality of openingsjQO. along its bose, snldopenings' being preferably 'triangular in outline with the apex, of the triangle cutting through the Alower edge orbase oftlie'dome.

Fitting loosely within. the dome to slide vertically therein is a tubular valve member 21 which is formed with an axiale ening 22 in its upper end ofslightl great er d1- ameter than the diameter of t e nozzlelt which is preferably tapered towurclits upper or discharge end.A The diameter of the lower end of the valve member is greater than the'diameter of the air inlet cloning 10 so that when said member is sente upon the bottom 9 it forms a closure for the. oir inlet and permits no oir to pass into the casing except :t small quantity which will be drown in by the suction of the engine through thesmoll s ace between the/edge of its 'opening- 22 an the nozzle 14,-.

To raise the vulve member 21 from its sent upon the. bottom oi thecasing and permit oir to, pass beneath` its lower edge through the, openings 20 said membenfyls providedrwith 4a pair of arms 23 entendit-i` upward through openings in the top. of the dome 16, ond ,to thetupper ends of these 9 bovins`r en. nxiellyA crine ero pvotoll;Y attached. links or rods 24 fwhich in turn are pivotally connected to downwardly extending ears 25 on the throttle valve 7. When the throttle valve is opened by means of the lever 8, the valve member 21 will be liftedv from its seat but if found desirable the valve member may be of said valve member upward aroi nd the.,

discharge end of the nozzle -to carry 'into the mixing chamber a large percentage of gas()- lene from the nozzle in proportion to tlf'e quantity of air admitted. The contracted upper end of the dome 16 also serves to direct the inrushing air upward around the nozzle and by reason ofthe strong suction which is created upon the nozzle by the valve and dome, a very small discharge opening may be provided in the nozzle from which the gasolene will be drawn inthe form of a spray. The air drawn .in in the initial starting of the engine is thus t-horoughly carbureted and heavily charged with gasolene vapor thus making a .very strong explosive mixture. The engine may therefore, be run at very low speeds by reasonof a thorough carbureting of the air and the strength of the ingoing charges. As the speed of the engine is increased by the opening of the throttle 7, the valve member 21 will be lifted in proportion thereto and an increased supply of air will rush in beneath the lower edge of the valve member 'and thro gli the openings 2O which are so shaped that the size of lthe opening through which the air may pass is increased both laterally and vertically as the member is raised. By reason of the tapering form of the upper end of the nozzle 14, the opening around said nozzle is also increased as the valve member is lifted and thus the suction upon the discharge end of the nozzle is reduced slightly as the speed of the engine increases. Theproportion of air to fuel is thus increased as'the speed of the engine increases, not only by the enlarging of the opening in the top of the valve member and consequent decrease of suction but also by the form of the openings '2O which is such that their capacity is multiplied as the valve is raised. In this construction the necessity for air and gasolene inlet adjustments isobviated as the valve member 21 operates to control both according to the requirements of the operation of the engine. Y

Obviously, changes maye made inlthe construction and arrangement of parts without departing from the spirit of my invention and I do not wish to limit myself to the construction and arian ement shown.

Having thus fully descri ed my invention what I claim isz 1. In a carbureter, the combination with l a casing having an air inlet, of concentric tubular members for controlling the air in-A let having contracted adjacent ends each formed with an axial opening, a-fuel supply member extending into the casing in the axis of said tubular vmembers with its discharge end projecting through the axial opening in the inner of said tubular members and extending adjacent to the opening in the outer of said members, and means for moving one of said tubular members relatively to the other, j

2. In a carbureter, the combination of a casing having an air inlet opening a fuel supply nozzle, a tubular controlling member surrounding the nozzle andvadapted to seat at one end upon the casing around the air inlet opening and to be lifted from its 'seat to admit air to the casing beneath its lower end, said member being formed with a contracted upper end having anV axial opening through which'the nozzle discharges, and means for lifting said controlling member from its seat on the casing.

3. In a carbureter, the combination of a casing having an air inlet at itslower end and an axial discharge outlet at its upper fend, a fuel supply nozzle extending upward in the casing at. the axis ofthe lower end thereof, a tubular controlling member seat- -ing upon the bottom of the casing around said air inlet and formed with a contracted upper end having an axial opening of greater diameter than the diameter of thev adjacent portion of the nozzle which projects therethrough, a member in the casing forming a vertical guide for the controlling member, and means for lifting the controlling member from its seat. A

4. In a carbureter, the combination of a casing having an air inlet opening, a fuelv supply nozzle extending into the casing at the axis thereof, a fixed tubular member in the casing around the air inlet opening and provided with openings near the end of the casing, a controlling member adapted to seat upon the casing around the air inlet and movable within the fixed member to" open and close the said openings therein, said controlling member having a contracted end provided with an, axial opening through which the nozzle projects, and means for moving the controlling member within the fixed member.

5. In a. carbureter, the combination of a casing having an air inlet opening at its lower end, a dome within the casing surrounding the air inlet and provided with side openings and an axial outlet opening, a

tubular controlling member movabie within the dome to control the owof air throu h the side openings in the dome, a nozzle int `e axis of the dome with its'discharge end adjacent to said axial opening, and means for Y actuating the. controlling member.

6. In a carbureter, the combination of a casing having an airinlet opening in its lower end and a discharge opening in its upper end, a fuel sup ly nozzle extending upward within' the casing at the axis thereof, a ixed dome in the' casing surrounding the air inlet opening and provided with openings in its side and an axial opening adjacent to the discharge end of the nozzle, a tubular controlling member slidable Within the dome and adapted to seat upon the lower end of the casing around the air inlet opening, said controlling member being formed with a contracted upper end provided with an axial opening through whlchthe nozzle extends, and means for lifting the controlling member from its seat.

I7. ln a carbureter, the combination of a cylindrical casing having an outlet opening in its upper end and provided with a bottom having an axial air inlet opening, a fuel supply nozzle extending upward in the casing at the axis of the lower end thereof and formed with a tapered discharge upper'end, a fixed domein the lower end of the casing having openings in its sides and an axial opening in its upper end adjacent to the discharge end of the nozzle, a tubular controlling member slidable within the dome and having a 'contracted upper end 'formed with -from the bottom of the casing inthe axis thereof and formed with a tapered upper discharge end, a ixed dome in the lower end of the casing surrounding the air inlet openbottom for tllieing and provided with openings in its sides i,

and an axial opening in its top, .atubular controlling member adapted to seat, upon the bottom of the casing around the air inlet opening to close the side openings in the dome andformed witha contracted upper end provided with an axial opening through which the tapering upper end of the nozzle projects, arms on the controlling member extending upward through openings in the` dome, a throttle valve in the outlet to the casing, and means connecting the throttle valve and arm to lift the controlling member when the throttle valve is actuated.

In testimony whereof I aiix my signature in presence of two Witnesses.

v JOSEF BRAUTIGAM. Witnesses:

LEWIS E. FLANDERS, ANNA M. Donn. 

